I'm having trouble printing certain pdf files on my local printer. The printed page has a redundant portion printed, which doesn't appear in the print preview. This is with an HP OfficeJet L7680 on a Windows 7 platform. If I print the same pdf file from a networked Windows 7 machine, using the same OfficeJet printer, the page prints correctly. Updating the driver on my local machine didn't help. So I'd like to find the driver which my networked machine is using, and replace the local machine's driver with that version. But I'm having some difficulty locating the driver on my networked machine. Networked printers don't appear in Device Manager. I have a utility called My Drivers which is supposed to collect all device drivers, but it doesn't show any drivers for the L7680 on the network machine. Please advise.